Home / 21,113.20-29,135.76-11,553.05

Finding the Fourth Proportional to 21,113.20, 29,135.76 and 11,553.05

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Solution

The fourth proportional to 21,113.20, 29,135.76 and 11,553.05 is: 15,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.20 : 29,135.76 = 11,553.05 : x
  2. Step 2: Convert to fraction form
    21,113.20/29,135.76 = 11,553.05/x
  3. Step 3: Cross multiply
    21,113.20x = 29,135.76 × 11,553.05
  4. Step 4: Simplify right side
    21,113.20x = 336,606,746.39
  5. Step 5: Solve for x
    x = 336,606,746.39/21,113.20
  6. Step 6: Final answer
    x = 15,942.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.